gfx: Make conversions from gfx::Point to PointF explicit.

ash/rotator/window_rotation.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/rotator/window_rotation.h"
 
 #include "base/time/time.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/interpolated_transform.h"
@@ skipping 65 matching lines @@
   current_transform.TransformPoint(&old_pivot);
   current_transform.TransformPoint(&new_pivot);
   current_transform.TransformPoint(&new_origin_);
 
   scoped_ptr<ui::InterpolatedTransform> rotation(
       new ui::InterpolatedTransformAboutPivot(
           old_pivot, new ui::InterpolatedRotation(0, degrees_)));
 
   scoped_ptr<ui::InterpolatedTransform> translation(
       new ui::InterpolatedTranslation(
-          gfx::Point(0, 0), gfx::Point(new_pivot.x() - old_pivot.x(),
-                                       new_pivot.y() - old_pivot.y())));
+          gfx::PointF(), gfx::PointF(new_pivot.x() - old_pivot.x(),
+                                     new_pivot.y() - old_pivot.y())));
 
   float scale_factor = 0.9f;
   scoped_ptr<ui::InterpolatedTransform> scale_down(
       new ui::InterpolatedScale(1.0f, scale_factor, 0.0f, 0.5f));
 
   scoped_ptr<ui::InterpolatedTransform> scale_up(
       new ui::InterpolatedScale(1.0f, 1.0f / scale_factor, 0.5f, 1.0f));
 
   interpolated_transform_.reset(
       new ui::InterpolatedConstantTransform(current_transform));
@@ skipping 14 matching lines @@
 }
 
 void WindowRotation::OnGetTarget(TargetValue* target) const {
   target->transform = interpolated_transform_->Interpolate(1.0);
 }
 
 void WindowRotation::OnAbort(ui::LayerAnimationDelegate* delegate) {
 }
 
 }  // namespace ash